there has to be an end to the universe... but how does it end? and every object in the universe has gravity, but what is gravity? explain how it works... why its there...
2006-10-24 12:29:32 · 9 answers · asked by Manda K 3 in Science & Mathematics ➔ Astronomy & Space
To answer your first question- yes the universe has an end, that is, it does not go on forever. You could never reach this boundary, however. The best way to describe the nature of the universe is to say it is like the SURFACE of a sphere, like the surface of the earth. It is a limited size, but instead of hitting any boundaries, you only wind up back where you started. There is no penetrable boundary at the edges of the universe. It is not infinite, just as the surface of a sphere is not infinite.
To answer your second question- Yes all objects have gravity. However, gravity is not a force as it is often described. According to Einstein and all other cosmologists to follow him, gravity is caused by the warp in the space-time continuum caused by any object with mass. More massive objects cause a bigger warp in space-time, and other, smaller objects can get caught in the warp. Picture a mattress with a bowling ball in the middle of it. The bowling ball warps the surface of the mattress, pushing it down. If an object were rolling around the bowling ball, the dent in the mattress could cause the object to circle the ball, stuck in the dent. This is the best way to describe gravity. It would take energy for an ant to climb up and escape from the bowling ball, just as it takes energy for us to move up away from the earth. The bowling ball warps the mattress surface just as massive objects warp the fabric of space and time.
2006-10-24 12:48:57 · answer #1 · answered by Nick Hahn 2 · 1⤊ 0⤋
The end of the universe is at best a theory. Almost an opinion. Some could consider it the cosmic backround radiation. Others may call it God's Hand. Who truly knows? Now about gravity? Gravity is the force that holds you down onto the Earth and effectively binds our universe together. Without gravity everything would just . . . drift. Gravity keeps our universe stable.
2006-10-24 16:53:08 · answer #2 · answered by Anonymous · 0⤊ 0⤋
The universe is a finite orb. It rotates (and, no this would not result in causal violation). The rotation creates several things. Also, mass of the stars, planets and moon help create gravity. The motion of the universe is mirrored in the motion of solar systems, galaxies, etc.
2006-10-24 13:22:15 · answer #3 · answered by rockEsquirrel 5 · 0⤊ 0⤋
Actually, we still don't know whether the universe is infinite or finite.
As far as gravity, the best theory so far is General Relativity. Read up on it.
2006-10-24 12:51:39 · answer #4 · answered by Anonymous · 0⤊ 0⤋
the "edge" of the universe is so distant in time, that it is actually the BEGINNING.
everything in the universe is made of photons. photons make orbits through 11 dimensions. these orbits are called STRINGS. the orbits of radiation photons have orbits that are FUNDAMENTAL, that is they have no harmonic content. Because of this, they can interlock with TIME, which is travelling at C (the "speed of light") to a photon, time does not pass because the photon is attached to it.
at the very beginning of the universe, everything was in a really tiny space. There was not enough room for the photons to expand and orbit as LIGHT, so some of them orbited around each other and formed MATTER.
MATTER has very complex orbits, and it can't attach to time, but it still affects time by dragging it, as a result, time gets distorted by matter. This distortion of time is what we call GRAVITY.
Other matter, since it is also trying to attach to time, gets pulled by this distortion, this is what holds our bodies to the earth.
Light, since it is attached to time, appears to travel in a bent path when it passes near matter, but actually the light is just following time in a distorted path.
coolest use of this: Astronomers used the "gravitational field" of an entire galaxy as a giant lense to see very distant galaxies.
2006-10-24 13:07:39 · answer #5 · answered by disco legend zeke 4 · 0⤊ 0⤋
No one knows where the Universe ends. We just believe that the end is after the asteroids just past Pluto.
The planets that have atmospheres are larger. The spinning of the planets creates the gravity that holds each planet's atmosphere in place.
To say that every object has gravity is not entirely true, but every spinning object does have gravity.
Take care,
Troy
2006-10-24 12:53:46 · answer #6 · answered by tiuliucci 6 · 0⤊ 5⤋
I´m afraid we can never be able to answer that question, because we are so small, and the universe so big ( and so small too) that our days will end without that answer
2006-10-24 14:29:40 · answer #7 · answered by LUIS BELISARIO 1 · 0⤊ 0⤋
Just bear in mind that you don't have to be able to visualise something to know it is real.
Example: nobody has seen electrons, and nobody can visualise the true nature of electrical current, but we wouldn't be talking to each other now without it, would we?
2006-10-24 13:08:01 · answer #8 · answered by nick s 6 · 0⤊ 0⤋
If you are serious get the book The Whole Shebang by Ferris.
No idea how old you are, but you may one day be a scientist!
2006-10-24 13:42:31 · answer #9 · answered by rwbblb46 4 · 0⤊ 0⤋